Having white lips; having a white lip or aperture, as a shell.
The Century Dictionary (Public Domain)
Use "white-lipped" in a sentence
"Grabbed her by the arm, ignoring her cry of pain and white-lipped grimace."
"The illusions of love are a strength, and the ways of love are divine; through them we come to that feeling of completion which is compatibility and which is as ineffable as the white-lipped promise of waves heard by those who have also listened to weeping."
"Occasionally we would catch sight of shimmering herds of gowa, the shy Tibetan gazelle, of wa, the white-lipped deer, or of tso, our majestic antelope."